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  1. Hive
  2. HIVE-5632

Eliminate splits based on SARGs using stripe statistics in ORC

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.13.0
    • Fix Version/s: 0.13.0
    • Component/s: None
    • Labels:

      Description

      HIVE-5562 provides stripe level statistics in ORC. Stripe level statistics combined with predicate pushdown in ORC (HIVE-4246) can be used to eliminate the stripes (thereby splits) that doesn't satisfy the predicate condition. This can greatly reduce unnecessary reads.

        Attachments

        1. HIVE-5632.1.patch.txt
          7 kB
          Prasanth Jayachandran
        2. HIVE-5632.2.patch.txt
          37 kB
          Prasanth Jayachandran
        3. orc_split_elim.orc
          241 kB
          Prasanth Jayachandran
        4. HIVE-5632.3.patch.txt
          39 kB
          Prasanth Jayachandran
        5. HIVE-5632.4.patch
          39 kB
          Gunther Hagleitner
        6. HIVE-5632.5.patch.txt
          39 kB
          Prasanth Jayachandran
        7. HIVE-5632.5.patch
          39 kB
          Gunther Hagleitner

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              • Assignee:
                prasanth_j Prasanth Jayachandran
                Reporter:
                prasanth_j Prasanth Jayachandran
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                Dates

                • Created:
                  Updated:
                  Resolved: